AT+CCFC=0,2 - To check if the unconditional call forwarding is on or off.
AT+CCFC=0,3,"Nunber" - To register the unconditional call forwarding to
the network.
AT+CCFC=0,1,"Nunber" - To activate the unconditional call forwarding.
AT+CCFC=0,0 - To deactivate the unconditional call forwarding.
AT+CCFC=0,3,"+972575684414" - For registration
AT+CCFC=0,1,"+ 972575684414" - For activation